Crank-shaft mechanism



Nov. 259 1924- 1,517,@39

' w. WISHART ET AL CRANK SHAFT, MECHANI SM Filed June 6 192] 2 Sheets-Sheet 1 W. WISHART ET AL -CRANK SHAFT MECHANISM Filed June 6, 1921 2 Sheets-Sheet. 2

atente Nov. 2, i924.

WILLIAM WISHART AND ALBERT H. MORRELL, F CLINTON, IOWA, ASSIGNO'RS, I BY MESNJE ASSIGNMENTS, T0 CLIMAX ENGINEERING COMPANY, OF CLINTON, IOWA, A

CORPORATION OF DELAWARE. b 1

CRANK-SHAFT MECHANISM.

Application filed June 6, 1921. Serial No. 475,179.

To all whom it may concern: In the drawings: I

Be it known that we, WILLIAM 7151mm Figure 1 is an elevation of an engine or 65 and ALBERT H. MORRELL, citizens of the Unitcompressor partly shown in section to dised States, and residents of the city' of close the crank shaft mechanism embodying Clinton, in the county of Clinton andState the principles of this invention.

of Iowa, have in'yented certain new and use- Figure 2 is a section taken on line 22 of ful Improvements in a Crank-Shaft Mecha- Figure 1. A nism; and we do hereby declare that the Figure 3 is a sectional View taken on line following is a full, clear, and exact descrip- 33 ,of Figure 1 showing the upper portion of'the same, reference being had to the] tion of the engine in elevation.

til

accompanying drawings, and to the numer- Figure 4 is a similar view showing the als of reference marked thereon, which form crank shaft rotated a quarter of a turn from W a part of this specification. the posltion shown in Flgure 3.

This invention relates more particularly Figure 5 is an enlarged detail section to an improved type of a mechanism for taken on line 5 of Figure 3 with parts connecting the piston of an engine or com. in elevation. press'or with a crank pin of a crank shaft As shown on the'drawings: to permit the piston to be reciprocated with- The reference numeral 1 indicates a crank in a cylinder without any tendency to cause case having an opening in the top, front wall 20 tilting of said piston when operated. and in each of the end walls. The opening It is an object of this invention to proin the front wall is closed by a removable vide an improved mechanism for connecting cover plate 2. Removably secured to the an engine piston with a crank shaft. respective end walls of the crank case and It is also an object of the invention to projecting through the end wall openings provide a crank shaft with a crank pin 001- are journal or hearing boxes 3 and 4 which lar adapted to slidably receive the headed serve to afiord suitable bearings for rotata-r end of a piston. bly supporting a crank shaft 5. The crank 30 It is a further object of the invention shaft operates in a bath of oil in-thecrank to afford an improved type of connection case and is providedwith cranks 6 conto between a piston and a crank shaft bearing ne/eted by crank pins 7.

box to insurepositive and proper lubrication Secured on the top of the crank case 1b of all the moving parts. V means of bolts 8 is an engine casting 9 whic It is furthermore an object of this invencloses the top opening of said crank case. tion to replace the connecting 'rod between a Forming a part of the casting 9 is a pair at crank shaft bearing and a piston by an imof parallel vertical cylinders 10. .Each cylproved connecting mechanism, the various -inder 10 has a piston llslidably mounted parts of-which are'all adapted to be positherein. Integrally formed axially on the tively lubricated by submersion in'a bath of bottom of each piston 11 is a stem or neck oil in the crank case, thereby obviating any 13. Formed integrally at right angles on 40 trouble resulting from operating parts bethe lower end of each neck 13 is a horizontal coming dry. plateor shoe 14 which is slidably engaged in 7 It is an important object of this invention a T-slot 15 formed in the upper portion to provide a crank shaft the crank pins of of a top bearing box section 16. A bottom which have engaged thereon slotted membearing box section 17 is removably secured 415 here adapted to slidably engage heads or to the bottom of the top bearing box section shoes formed onthe' ends of pistons which by bolts 18 or other suitable means. The v are to be operated by the crank shaft. bearing box sections or collars 16 -17 are Other and further important objects of provided with semi-cylindrical grooves to this invention will be apparent from the permit saidsections to be engaged around 50 disclosures in the specification and drawings. the crank pins 7 to permit operation of the The invention (in a preferred form) is pistons by the crank shaft. illustrated in the drawings and hereinafter The operation is as follows: more fully described. In the device illustrated in Figure 1 the collarsto slide with respect to the piston shoes 14 to reciprocate the pistons 11 in the cylinders 10.

The novel arrangement -of havin the I piston shoes 14: slidably engaged in t e T- slots of the crank shaft collars permits the pistons to be reciprocatedwithout any tend-.

ency to tilt the same within said cylinders to cause irregular Wear of the parts.

The crank shaft mechanism may be used in an engine as well as in a compressor. .The device is also adaptable to permit slidable movement of the collar with respect to the piston shoe when the piston is reciprocated to cause the crankshaft to rotate.

This invention eliminates the use of a connecting rod between the crank shaft bearing and the piston and substitutes the' improved slidable connection to insure positive and proper lubrication of all the moving parts forming the connection. Where a connecting rod is used, it is impossible to properly. lubricate the wrist pin which is connected with the piston, and as a result,

the wrist pin becomes dry and causes trouble. In the present invention, the crank shaft, crank pins, bearing boxes and the slidable connections between the pistons and the bearin boxes are adapted to be properly submerge in oil in the crank case, thereby insuring proper lubrication of the operating parts and eliminating trouble resulting from improper lubrication.

Weare aware that numerous details of construction may be varied through a wide range without departing from the principles of this invention, and we therefore do not wise than necessitated by the prior art. We claim as our invention: 1 1. The combination with a crank shaft and apiston, of a shoe integrally formed on one end of said piston, a collar journalled on a crank pin forming part of the crank shaft, said collar having a T-slot therein for receiving said shoe to permit slidable movement of said collar. with respect to saidshoe when the crank shaft is operated to reciprocate said piston, or'when said piston-is reciprocated to cause the crank shaft to rotate. 1 2. A crank shaft mechanism comprising a crank shaft, a crank pin forming a part thereof, a collar engaged on said crank pin, said collar embracing a-lower section and an upper section secured to one another around said crank pin, said upper collar section having a T-slot therein, a piston, and,

purpose limiting the patent granted other- 

